Version 4 is the most efficient OQNM ever. It's half the size of OQNM3 and only a quarter the size of its grand-daddy, OQNM2. This is possible because web pages are becoming easier to add dynamic content to, which is definitely a good thing.
OQNM4 can be used on a machine with as small as 640x480 resolution and 256 colours. The only limitation on using OQNM4 is the type of browser you use. Currently, OQNM4 has been tested and works completely with these generations of browsers: